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hugetlb: add phys addr to struct huge_bootmem_page

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This is needed on HIGHMEM systems - we don't always have a virtual
address so store the physical address and map it in as needed.

[akpm@linux-foundation.org: cleanup]
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Becky Bruce 2011-07-25 17:11:50 -07:00 committed by Linus Torvalds
parent 2b37c35e65
commit ee8f248d26
2 changed files with 12 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
include/linux/hugetlb.h
View file

@ -231,6 +231,9 @@ struct hstate {
struct huge_bootmem_page { struct huge_bootmem_page {
struct list_head list; struct list_head list;
struct hstate *hstate; struct hstate *hstate;
#ifdef CONFIG_HIGHMEM
phys_addr_t phys;
#endif
}; };
struct page *alloc_huge_page_node(struct hstate *h, int nid); struct page *alloc_huge_page_node(struct hstate *h, int nid);

10
mm/hugetlb.c
View file

@ -1105,8 +1105,16 @@ static void __init gather_bootmem_prealloc(void)
struct huge_bootmem_page *m; struct huge_bootmem_page *m;
list_for_each_entry(m, &huge_boot_pages, list) { list_for_each_entry(m, &huge_boot_pages, list) {
struct page *page = virt_to_page(m);
struct hstate *h = m->hstate; struct hstate *h = m->hstate;
struct page *page;
#ifdef CONFIG_HIGHMEM
page = pfn_to_page(m->phys >> PAGE_SHIFT);
free_bootmem_late((unsigned long)m,
sizeof(struct huge_bootmem_page));
#else
page = virt_to_page(m);
#endif
__ClearPageReserved(page); __ClearPageReserved(page);
WARN_ON(page_count(page) != 1); WARN_ON(page_count(page) != 1);
prep_compound_huge_page(page, h->order); prep_compound_huge_page(page, h->order);